My 2-year-old goes through daycare and I'm constantly dealing with water leaking everywhere in the bag. We've tried a few cheap ones and they all seem to have issues. What brands actually hold up and don't create puddles?
Sippy cups with locking lids like Thermos Foogo or Contigo Autoseal are basically leak-proof if the seal's on right - I've seen them survive getting tossed around in bags without a drop escaping. The trick is actually checking that the lid's twisted all the way before it goes in the diaper bag, since most leaks happen from user error rather than the bottle itself failing.
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